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Inner product of multi-dimensional arrays [message #3519]

Mon, 06 February 1995 02:03

Fergus Gallagher
Messages: 41
Registered: January 1995

Member

I want to form a matrix mulipication of the form

C(i,j,k) = B(i,j,r) A(r,k) (summed over r)

With some index cleverness, I could form a 4-D intermediate array and
sum this over one index, but this intermediate array wouldn't fit
into memory in my case.

Does anyone have a suitable (fast) algorithhm for this sum. Even
better would a generalized procedure for

C = A(.....r.....) B(..r.....)

Thanks

Fergus Gallagher
British National Space Centre

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Inner product of multi-dimensional arrays

By: Fergus Gallagher on Mon, 06 February 1995 02:03

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